Initially determined, according to the video reproduction go with normal fault might appear on camera, camera, video, and sensing circuit. Open the belt cover, observed after load perturbation, video error protected switch has contact. At this time will be the engine cover all break out, check the lens, SheLuXiang circuit, but found no problem. Check again SheLuXiang error protected switch, found that the contact corrosion phenomenon, with fine sand paper will rust away, after contact is measured with a multimeter has good contacts, plus electrical commissioning, and troubleshooting.4f6service manual download site